Chapter 6 Soil

What horizon is mineral layer soil?

• A Horizon

• O Horizon

• C Horizon

• B Horizon

What is the process by which soil is created?

• Soil Salination

• Soil Evolution

What layer composed of underlying bedrock?

• A Horizon

• B Horizon

• C Horizon

• O Horizon

What is the dark organic material in soil, produced by the decomposition of vegetable or animal matter?

• humus

• sand

• silt

• clay

What is the topmost layer of most soils?

• B Horizon

• A Horizon

• O Horizon

• C Horizon

What layer is composed of minerals and organic matter?

• O Horizon

• A Horizon

• B Horizon

• C Horizon

Made up of a mixture of minerals, air, water and organic matter.

• soil

• rock

What is the accumulation of salts that leads to negative effects on plants?

• soil salination

• soil evolution

• soil erosion

Land where soil is worked and crops are planted, cared for, and harvested.

• grassland

• cropland

If the soil is acid, the litmus paper turns ____.

• red

• blue